body{

 text-align:center; margin:0 auto;

}
.big-bg{
	height: 100%;
	width: 100%;
}
.main{
	
    top: 0px;
    left: 0px;
    width: 100%;
    height: 100%;
    position: absolute;
  

}
.manage{
	height: 100px;
	margin-top: 10px;
}
.title{
	margin:0 auto;
}
.enterace{
	height: 500px;
}

.xt{
 font-family: 微软雅黑; 
color: #fff;
width: 50%;
height: 100%;
display: inline-block;
text-decoration:none;
cursor:pointer;
}
.enterace a:hover img{width: 320px;height:98px;}
.enterace a img{
	width:300px;
	height: 92px;
}
